// Prompts the user from stdin to record a withdrawal from their account
private static void Withdrawal(Services.BankLedger ledger)
{
Console.WriteLine("Enter amount to withdraw:");
Console.WriteLine($"Type {EXIT_KEYWORD} to return to menu.");
Console.Write("$");
var amount = -1.0;
var input = Console.ReadLine();
var currentBalance = ledger.GetCurrentBalance();
// TODO add regex for $xx.xx
//verifying user typed valid input (can be parsed as double and > 0, or exit keyword)
while (!input.Equals(EXIT_KEYWORD, StringComparison.OrdinalIgnoreCase) && !(double.TryParse(input, out amount) && amount <= currentBalance && amount >= 0))
{
Console.WriteLine();
if (amount > 0)
{
// user entered amount greater than their balance. Reset amount to -1 to continue loop
Console.WriteLine($"Insufficient funds to withdraw ${amount}");
amount = -1.0;
}
else
{
Console.WriteLine("Invalid amount entered.");
}
Console.WriteLine($"Enter an amount to withdraw, or type {EXIT_KEYWORD} to return to menu:");
Console.Write("$");
input = Console.ReadLine();
}
// don't withdraw if they typed the exit keyword
if (!input.Equals(EXIT_KEYWORD, StringComparison.OrdinalIgnoreCase))
{
ledger.Withdrawal(amount);
Console.WriteLine();
Console.WriteLine($"Withdrawal successful. New account balance: {ledger.GetCurrentBalance()}");
}
Console.WriteLine();
}
public void TestWithdrawal_LoggedOut()
{
Assert.ThrowsException <NullReferenceException>(() => ledger.Withdrawal(0));
}